and they tend to cluster in places like san francisco. this company that makes new packages for the ipad -- and again, compare it to the number of employees at foxconn, millions compared to maybe 2000. and then you are technologies like 3d printing and you're able to get from astra concept to prototype -- abstract concept to provide in very short order. changes everything so quickly. and by having this tightly connected supply chain, you can walk the floor and have better control. you can incrementally improve. in the old days, there was a curious about the life cycle of a product. it would come out and incrementally improve over a certain time frame and then after seven years it would be obsolete. that cycle has accelerated so much that if people want a new ipads or inouye iphone every couple -- or on your iphone every couple of months, that seems like a long time prepared -- or a new iphone every couple of months, that seems like a long time. host: in the article appeared "-- in the article "mr. china comes to america," -- guest: in thi